api-argv-array.txt: remove broken link to string-list API

In 4f665f2 (string-list.h: move documentation from Documentation/api/
into header, 2017-09-26) the string-list API documentation was moved to
string-list.h.  The argv-array API documentation may follow a similar
course in the future.  Until then, prevent the broken link from making
it to the end-user documentation.

Signed-off-by: Todd Zullinger <[email protected]>
Reviewed-by: Jonathan Nieder <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: tmzullinger

Documentation/technical/api-argv-array.txt

@@ -8,7 +8,7 @@ always NULL-terminated at the element pointed to by `argv[argc]`. This
 makes the result suitable for passing to functions expecting to receive
 argv from main(), or the link:api-run-command.html[run-command API].
 
-The link:api-string-list.html[string-list API] is similar, but cannot be
+The string-list API (documented in string-list.h) is similar, but cannot be
 used for these purposes; instead of storing a straight string pointer,
 it contains an item structure with a `util` field that is not compatible
 with the traditional argv interface.